在Cordyceps javanica中具有杀虫潜力的二次代谢物
Peixiang Xing1, Ruixia Mao2, Guisen Zhang2
1College of Plant Protection, Shanxi Agricultural University, Taiyuan 030031, Shanxi, China; State Key Laboratory of Sustainable Dryland Agriculture (in preparation), Shanxi Agricultural University, Taiyuan 030031, Shanxi, China.
Pesticide biochemistry and physiology
|September 14, 2024
概括
科迪塞普斯 (Cordyceps javanica) 发酵含有类异素,是一种强大的杀虫毒素. 这种化合物通过抑制乙胆酶 (AChE) 来有效向Myzus persicae,揭示了一种新的杀虫机制.
科学领域:
- 农业昆虫学 农业昆虫学
- 菌类学 菌类学是指菌类学.
- 生物化学 生物化学
背景情况:
- 科迪塞普斯 (Cordyceps javanica) 是一种注册的真菌杀虫剂,其作用机制尚不完全理解.
- 代谢毒素在C. javanica杀虫活性中的作用需要进一步研究.
研究的目的:
- 为了评估C. javanica发酵的杀虫活性.
- 为了确定对杀虫剂作用负责的特定有毒代谢物.
- 为了阐明杀虫剂作用的分子机制.
主要方法:
- 在不同的时间点 (发酵后3天和5天) 发酵C. javanica和收集代谢.
- 生物测试以确定对Myzus persicae的杀虫活性.
- 化学分析以确定关键代谢物.
- 酶抑制试验用于评估乙胆酶 (AChE) 抑制活性.
- 分子对接和动态模拟来预测结合相互作用.
主要成果:
- 来自C. javanica的代谢显示出对Myzus persicae.不同的杀虫活性.
- 类异素被确定为一种关键的杀虫代谢产物.
- 异素表现出高的杀虫活性 (LC50 = 0.2272 mg/L) 和强大的ACHE抑制 (IC50 = 76.69 μM).
- 分子模拟表明,异素与M.persicae AChE的外周阳离子位 (PAS) 结合,抑制其活性.
结论:
- 异素是一种重要的杀虫剂化合物,由C. javanica生产.
- 杀虫剂机制涉及通过异素抑制乙胆酶.
- 这一发现有助于理解C. javanica复杂的杀虫特性,并突出了异素作为一种具有杀虫潜力的罕见真菌代谢物.
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